add shutdown tmpfile

diff --git a/programs/instantshutdown b/programs/instantshutdown
index 688644b..8386391 100755 (executable)
--- a/programs/instantshutdown
+++ b/programs/instantshutdown
@@ -37,6 +37,7 @@ zconfirm() {
 
 prepareshutdown(){
     # save current brightness
+    touch /tmp/shuttingdown
     if CURBRIGHT="$(/usr/share/instantassist/utils/b.sh g)"
     then
         iconf savebright "$CURBRIGHT"